创建MySQL触发器时​​出错

Question

I'm trying to create this trigger but i'm getting

[Err] 1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '; CREATE TRIGGER ca_passwd_trigger BEFORE UPDATE ON users FOR EACH ROW BEGIN ' at line 1

delimiter $$
DROP TRIGGER IF EXISTS ca_passwd_trigger ;
$$
CREATE TRIGGER ca_passwd_trigger BEFORE UPDATE ON users
FOR EACH ROW
BEGIN
    IF ((NEW.passwd <=> OLD.passwd) = 0) THEN
        SET NEW.passwd_modified_at = NOW();
    END IF;
END;$$
delimiter ;

Answer 1

In your query you added the query terminator ; with the delimiter $$ in two places. The below query is having proper query terminators and delimiters.

DELIMITER $$
DROP TRIGGER IF EXISTS ca_passwd_trigger; -- removed the delimiter $$ after the terminator ;
CREATE TRIGGER ca_passwd_trigger BEFORE UPDATE ON users
FOR EACH ROW
BEGIN
    IF ((NEW.passwd <=> OLD.passwd) = 0) THEN
        SET NEW.passwd_modified_at = NOW();
    END IF;
END$$  -- removed the terminator ; before the delimiter $$
DELIMITER ;